public void AddChild( DASM16Builder child )
{
if ( child.Length > 0 )
{
myChildren.Add( Length, child );
InstructionCount += child.InstructionCount;
Length += child.Length;
}
}
public void AddMethod( String identifier, ValType[] paramTypes, ValType returnType, bool inline, DASM16Builder method )
{
if ( inline )
myMethods.Add( new MethodInfo( identifier, paramTypes, returnType ), method );
else
{
String label = "__" + Identifier + "__" + identifier;
foreach ( ValType type in paramTypes )
label += "__" + type.Identifier;
stStaticASM.AddLabel( label, false );
stStaticASM.AddChild( method );
AddMethod( identifier, paramTypes, returnType, true, "JSR " + label );
}
}
public static DASM16Builder Parse( String str )
{
DASM16Builder builder = new DASM16Builder();
int offset = 0;
while ( offset < str.Length )
{
SkipWhitespace( str, ref offset );
if ( IsNextCommand( str, offset ) )
{
int startOffset = offset;
DASM16CommandInfo cmd = ReadCommand( str, ref offset );
switch ( cmd.Command )
{
case DASM16Command.Define:
case DASM16Command.LDefine:
ushort val;
try
{
val = ParseLiteral( cmd.Args[ 1 ] );
}
catch ( AssemblerException )
{
throw new AssemblerException( str, startOffset, "Invalid second argument for definition, expected literal value" );
}
builder.AddConstant( cmd.Args[ 0 ], val, cmd.Command == DASM16Command.LDefine );
break;
case DASM16Command.Include:
String path = cmd.Args[ 0 ];
if ( !File.Exists( path ) )
throw new AssemblerException( str, startOffset, "Cannot include file at \"" + path + "\", file does not exist" );
String code = File.ReadAllText( path );
try
{
builder.AddChild( Parse( code ) );
}
catch ( AssemblerException e )
{
throw new AssemblerException( str, startOffset, e.Message + "\n in included file \"" + path + "\"" );
}
break;
}
continue;
}
if ( IsNextLabelDefinition( str, offset ) )
{
int startOffset = offset;
if ( ++offset >= str.Length )
throw new AssemblerException( str, offset, "Unexpected end of file" );
bool local = str[ offset ] == ':';
if ( local )
++offset;
SkipWhitespace( str, ref offset );
if ( offset >= str.Length )
throw new AssemblerException( str, offset, "Unexpected end of file" );
String label = ReadLabel( str, ref offset );
if ( label.Length == 0 )
throw new AssemblerException( str, offset, "Label identifier expected" );
builder.AddLabel( label, local );
continue;
}
if ( IsNextOpcode( str, offset ) )
{
builder.AddInstruction( ReadInstruction( str, ref offset ) );
continue;
}
if ( offset < str.Length )
throw new AssemblerException( str, offset, "Expected .command, :label or opcode" );
}
return builder;
}
